Intel MPCBL0001 manual System Event Log SEL, Hardware Sensors Sheet 3, IPMB-0

Intel NetStructure® MPCBL0001 High Performance Single Board Computer

Contents

Table 2.	Hardware Sensors (Sheet 3 of 3)
	Sensor		Voltage/Signals	Monitored	Scanning	Health LED
		Sensor Type			Enabled
	Number		Monitored	via	under Power	(Green to Red)
					State
	82h	ACPI State	ACPI State	IPMC	Power On/	No change
					Off
	83h	System Event	System Event	IPMC	Power On	No change
	1Ah		+12 V	ADM 1026	Power On	Exceeds critical
						threshold
	1Bh		-12 V	ADM 1026	Power On	Exceeds critical
						threshold
	1Ch		CPU Core Voltage	ADM 1026	Power On	Exceeds critical
						threshold
	1Dh	Voltage	+1.5 V	ADM 1026	Power On	Exceeds critical
						threshold
	8Ah	FRU Hot Swap	FRU State	IPMC	Power On/	No change
					Off
	8Bh	IPMB Link Sensor	Operational state of	Logical	Power On/	No change
			IPMB-0		Off
	E0h	SMI Timeout	Steady state	IPMC	Power On	SMI Line asserted
			assertion of the SMI			(Offset bit 01h asserted)
			line

NOTE: The PROCHOT signal is a discrete signal but it is treated as a threshold sensor so that it can have a Sensor Type of Temperature. IPMI does not have a discrete sensor type for temperatures. The advantage of the PROCHOT sensor acting as a temperature sensor is that the CMM can recognize events from this sensor as temperature events and adjust fan speed accordingly.

3.2System Event Log (SEL)

The SEL is the collection of events that are generated by the IPMC. Event logs are stored in non- volatile memory. This resides on the board and allows better tracking of error conditions on the baseboard when it is moved from chassis to chassis. Having the SEL and logging functions managed by the IPMC helps ensure that post-mortem logging information is available should a failure occur that disables the systems processor(s). In the MPCBL0001, flash memory for IPMI firmware can store up to 3276 SEL entries. Management software running on the host processor is responsible for ensuring that SEL storage has sufficient space for SEL logging. Events are normally forwarded to shelf manager and logged to SEL on the board. If SEL storage on the board is full, new events are forwarded to the Shelf Manager but are not logged in to SEL on the board.

A set of IPMI commands (see Table 108, “IPMI 1.5 Supported Commands” on page 189) allows the SEL to be read and cleared and allows events to be added to the SEL. The IPMI commands used for adding events to the SEL are Platform Event Message, Add SEL entry, and Partial Add Entry. Table 3, “SEL Events Supported by the MPCBL0001 SBC” on page 33 lists supported SEL events. Event Messages can be sent to the IPMC via the IPMB. This provides the mechanism for satellite controllers to detect events and log them into the SEL.

32	Technical Product Specification
	Order #273817